小学四则运算

运行代码：

import random
四则运算

def t():
sym = ['＋', '－', '×', '÷']
f= random.randint(0, 3)
n1 = random.randint(1, 20)
n2 = random.randint(1, 20)
result = 0
if f== 0:#加法
result = n1 + n2
elif f == 1:#减法，要先比较大小，防止输出负数
n1, n2 = max(n1, n2), min(n1, n2)
result = n1 - n2
elif f== 2:#乘法
result = n1 * n2
elif f == 3:#除法，要比较大小，并循环取整除
n1, n2 = max(n1, n2), min(n1, n2)
while n1 % n2 != 0:
n1 = random.randint(1, 10)
n2 = random.randint(1, 10)
n1, n2 = max(n1, n2), min(n1, n2)
result = int(n1 / n2)
print(n1, sym[f], n2, '= ', end='')
return result
def test():

print('输入所需要的题目数量')
n=int(input())
result =[]
m=0
while m<=(n-1):
    print(m+1,end='、')
    result .append(t())
    print(' ')
    m=m+1
m=0
print('对应的答案：')
while m<=(n-1):
    print(m+1,'、',result [m])
    m=m+1

print('选择想要的模式')
print('1、进行四则运算')
print('2、制作题库')
n=int(input())
当输入1时，进行四则运算，调用函数t()
if n1:
while True:
result = t()
j= input()
s= int(j)
if s result :
print('right')
else:
print('error.，the answer is', result )
当输入2时，进行制作题库
if n==2:
test()

运行截图如下：